Title:
MULTI-PASS WELDING METHOD, MULTI-PASS BUTT WELDED JOINT, AND LAMINATION PATTERN CALCULATION METHOD FOR MULTI-PASS WELD
Document Type and Number:
WIPO Patent Application WO/2023/007950
Kind Code:
A1
Abstract:
Provided are: a multi-pass welding method capable of minimizing bead sagging and forming a welded joint having a good weld metal surface, even during multi-pass welding in a horizontal orientation; a multi-pass butt welded joint; and a lamination pattern calculation method for a multi-pass weld formed by the multi-pass welding method. The weld metal (WL) has a plurality of layers from the rear surface (1B) of a base material to the front surface (1A) thereof. The plurality of layers comprise: a finishing layer (FL) having at least two layers including an end layer (EL); and a ground layer (GL) for forming the finishing layer (FL). A boundary layer (BL), which is the layer of the ground layer (GL) adjacent to the finishing layer (FL), is formed such that the position (PUB) of an upper plate-side weld is closer to the front surface (1A) of the base material than the position (PLB) of a lower plate-side weld.
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Inventors:
YASHIMA TAKASHI
Application Number:
PCT/JP2022/022862
Publication Date:
February 02, 2023
Filing Date:
June 06, 2022
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
B23K9/127; B23K9/02
Foreign References:
| JPS49111853A | 1974-10-24 | |||
| JP2004074212A | 2004-03-11 | |||
| JPS5155828U | 1976-04-30 | |||
| JP2002028780A | 2002-01-29 | |||
| JP2000000664A | 2000-01-07 | |||
| JPH10216937A | 1998-08-18 | |||
| JPH09108838A | 1997-04-28 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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